So in the 25 or so years that I have been skateboarding I have ridden my fair share of wheels. In the last few years I have almost exclusively been skating Spitfire Formula 4 101 or 99 duro wheels and I have to say I really enjoy these wheels.
They rarely flat spot and when they do they disappear very quickly. Not only that, but they seem to last longer than most wheels I have ridden in the past. The problem I have had with wheels is that they seem to cone on my toe side. Not Spitfires. They seem to hold up to the daily wear and tear better than any wheel.
I highly recommend these wheels above all others.